- Dec 10, 2006
- 35
- 0
- 18,540
I am pulling my (very limited) hair out trying to figure out why I can't get ANY of the 5 Supermicro H8DMR boards I bought off eBay to boot. They were listed as "good pulls" from big sellers with 100% feedback ratings. Two are from one seller, the others from other sellers.
I've followed all of the "computer won't boot" troubleshooting tips and I am still stymied.
I have a brand new Corsair 750 watt supply. Voltages UNDER LOAD test fine (on another motherboard, an Asus board with an i7-920 CPU)
I have four pairs of Opteron 2000 series CPU chips said to be good (from eBay)
I am 'breadboarding' these boards on a wooden workbench, just the PSU, RAM, CPU(s)/coolers, and a video monitor.
Placing a CPU (or two matching ones) on the board with cooler, some RAM and plugging all power supply leads into the board, shorting the CLEAR CMOS pins and switching on the PSU then shorting the "POWER ON" pins - NOTHING happens. No fans, PSU fan does not turn on, nothing on the video, NOTHING. Tried every possible combination of single or pairs of CPUs in each motherboard, tried it with and without CMOS batteries (batteries tried are all brand new, test good with DVM) still NOTHING
Here's the kicker: I took a working motherboard from a spare server, put it on my workbench with some ram, power and video connected, and it FIRED RIGHT UP. Then I tried two of my eBay CPUs in this motherboard and it did nothing so I put the board's 'KNOWN GOOD' CPUs back in and now this board won't boot either. I have never heard of a CPU breaking a motherboard....
I've examined the CPU socket pins with a microscope- they all look fine. The motherboards are all spec'd to run with any 2000- series Opterons, and that is what I've got.
I am beginning to think that all these eBay "good pull" CPUs are bad, or all the motherboards are - or both.
Any suggestions? And just to reiterate, I DID follow the much-vaunted http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
I've followed all of the "computer won't boot" troubleshooting tips and I am still stymied.
I have a brand new Corsair 750 watt supply. Voltages UNDER LOAD test fine (on another motherboard, an Asus board with an i7-920 CPU)
I have four pairs of Opteron 2000 series CPU chips said to be good (from eBay)
I am 'breadboarding' these boards on a wooden workbench, just the PSU, RAM, CPU(s)/coolers, and a video monitor.
Placing a CPU (or two matching ones) on the board with cooler, some RAM and plugging all power supply leads into the board, shorting the CLEAR CMOS pins and switching on the PSU then shorting the "POWER ON" pins - NOTHING happens. No fans, PSU fan does not turn on, nothing on the video, NOTHING. Tried every possible combination of single or pairs of CPUs in each motherboard, tried it with and without CMOS batteries (batteries tried are all brand new, test good with DVM) still NOTHING
Here's the kicker: I took a working motherboard from a spare server, put it on my workbench with some ram, power and video connected, and it FIRED RIGHT UP. Then I tried two of my eBay CPUs in this motherboard and it did nothing so I put the board's 'KNOWN GOOD' CPUs back in and now this board won't boot either. I have never heard of a CPU breaking a motherboard....
I've examined the CPU socket pins with a microscope- they all look fine. The motherboards are all spec'd to run with any 2000- series Opterons, and that is what I've got.
I am beginning to think that all these eBay "good pull" CPUs are bad, or all the motherboards are - or both.
Any suggestions? And just to reiterate, I DID follow the much-vaunted http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
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